Toro Groundsmaster 5900 Series Service Manual page 366

Testing (continued)
Electrical System: Component Testing
5. Using a multimeter, verify that coil resistance between terminals 85 and 86
is from 71 to 88 ohms
6. Connect multimeter (ohms setting) leads to relay terminals 30 and 87.
Ground terminal 86 and apply +12 VDC to terminal 85. The relay should
make and break continuity between terminals 30 and 87 as +12 VDC is
applied and removed from terminal 85.
7. Disconnect voltage from terminal 85 and multimeter lead from terminal 87.
8. Connect multimeter (ohms setting) leads to relay terminals 30 and 87A. Apply
+12 VDC to terminal 85. The relay should make and break continuity between
terminals 30 and 87A as +12 VDC is applied and removed from terminal 85.
9. Disconnect voltage and test leads from the relay terminals.
10. If testing determines that the relay is not functioning correctly, replace the
relay.
11. If the relay tests correctly and a circuit problem still exists:
A. Check wire harness (see
B. Use the InfoCenter Display to check specific TEC output operation (see
InfoCenter Display (page
12. Secure relay to mounting bracket and connect wire harness connector to
relay.
13. Install and secure panels and covers removed to access relays.
14. Turn the battery−disconnect switch to the ON position before returning the
machine to service.
(Figure 247).
Appendix A (page
6–9)).
Page 6–104
A–1)).
Groundsmaster ® 5900 & 5910
16227SL Rev B